CN104565535A - Nodular cast iron pipe jacking pipe and manufacturing method thereof - Google Patents
Nodular cast iron pipe jacking pipe and manufacturing method thereof Download PDFInfo
- Publication number
- CN104565535A CN104565535A CN201410813080.2A CN201410813080A CN104565535A CN 104565535 A CN104565535 A CN 104565535A CN 201410813080 A CN201410813080 A CN 201410813080A CN 104565535 A CN104565535 A CN 104565535A
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- Prior art keywords
- pipe
- ductile iron
- push pipe
- mould
- iron pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a nodular cast iron pipe jacking pipe and a manufacturing method of the nodular cast iron pipe jacking pipe. The top pipe comprises a nodular cast iron pipe, a jacking pipe die, a sealing flange, concrete, a steel wire mesh, a connecting piece and a socket steel ring. The manufacturing method disclosed by the invention comprises the following steps of welding the nodular cast iron pipe, the connecting piece and the steel wire mesh together mutually by adopting an automatic welding technology of carbon dioxide arc welding, and then putting into the jacking pipe die; pouring into the concrete, carrying out steam curing, then installing the socket steel ring and welding the socket steel ring onto the connecting piece; after paint is sprayed, putting plastic adhesive tapes on two ends of a jacking pipe socket, slotting in the middle of each adhesive tape, and firmly fastening in the slots through packing steel strips. According to the manufacturing method disclosed by the invention, the jacking pipe is smooth in appearance, the resistance can be reduced in the construction process, the strength accords with the performance requirement of 500-1200t jacking force in the jacking process, the non-excavation underground construction demand can be completely satisfied, and the jacking pipe is strong on corrosion resistance and reliable in quality.
Description
technical field:
The present invention relates to technical field of pipe, especially relate to a kind of ductile iron pipe push pipe and preparation method thereof.
background technique:
Common ductile iron pipe pipeline construction method is by road surface or construction site excavation, then carries out laying and the landfill of pipeline.In work progress, the traffic congestion of destruction to building and road can be caused, this for heavy, the big and medium-sized cities that densely populated, above ground structure is numerous, underground utility are complicated can cause construction cost greatly to increase, sometimes even cannot carry out.
Ductile iron pipe push pipe is the laying of the driving of the no-dig technique for a municipal construction formula under ground piping or the construction technology of replacing, by active well, the pipe that will bury underground is headed in soil during installation, and can also walk by curve, to get around some underground utility or obstacle.
Therefore a kind of ductile iron pipe push pipe and its preparation method is efficiently and effectively needed now.
summary of the invention:
The present invention is in order to solve the problem; provide a kind of spheroidal graphite cast iron push pipe and preparation method thereof; make spheroidal graphite cast iron push pipe both can reduce jacking resistance when jacking; make each position stress equalization; also cast iron tube part can be protected to be without prejudice, to reach the performance requirement that ductile iron pipe push pipe end face bears the jacking power of 500 ~ 1200t.
The technical solution used in the present invention is: a kind of ductile iron pipe push pipe, comprises ductile iron pipe, push pipe mould, sealing flange, concrete, steel wire, link and socket steel ring; Described ductile iron pipe side is connected with push pipe mould, and push pipe mould side is provided with sealing flange, is provided with steel wire between described push pipe mould and ductile iron pipe, and link is arranged on the outside of ductile iron pipe and is connected with socket steel ring; The pipe die female end of described ductile iron pipe is provided with groove.
Further, described groove groove depth 15 ~ 20mm, wide 20 ~ 30mm, one end of groove is provided with the tool withdrawal groove of 45 °.
Further, described push pipe mould is 1970 ~ 5980mm, and mould internal diameter size is 403 ~ 1577mm, and thickness is 25 ~ 50mm.
Further, described sealing flange is provided with two seal grooves, and seal groove internal diameter is respectively 340 ~ 1330mm and 490 ~ 1400mm, groove depth 4mm, groove width 9.5mm.
The preparation method of described spheroidal graphite cast iron push pipe, is characterized in that having following steps:
The first step: go out groove in the pipe die female end turning of ductile iron pipe;
Second step: water the ductile iron pipe outpouring female end band boss;
3rd step: cast iron push pipe is loaded in push pipe mould, sealing flange loaded onto by mould;
4th step: mould is established, loads onto steel wire, link of burn-oning, pours into the concrete prepared by a certain percentage;
5th step: steam curing 10 ~ 12 hours;
6th step: load onto socket steel ring after outward appearance polishes smooth, then puts two ripe adhesive tapes respectively at push pipe two ends, and in the middle of ripe adhesive tape, fluting, stamps strap and fix.
Further, described concrete proportioning is cement 1 part, coarse sand 1.3 ~ 1.4 parts, and 2.5 ~ 2.8 parts, stone, 0.4 ~ 0.5 part, water and a small amount of air entraining agent, stir 10 minutes by raw material.
Further, adopt FR Ni-1 pure nickel iron welding wire when welding, and adopt carbon dichloride as shielding gas.
Further, the gas flow of described shielding gas is 15 ~ 25m
3/ h.
The beneficial effect that the present invention produces is:
1, have construction save time, economical, efficient, the comprehensive functions such as protection of the environment, comprehensive cost are low, safe.
2, can highway crossing, railway, bridge, high mountain, river, any building in straits and ground, can underground job be goed deep into.
3, do not destroy above ground structure, do not affect, do not destroy surrounding environment, do not affect traffic.
4, do not remove, a large number of earth clearance expense can be saved.
5, construct the impact of not climate and environment, construction site is little, and noise is little.
6, do not affect the section difference distortion of pipeline, be specially adapted to the non-excavation laying of big-and-middle-sized caliber.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized by structure specifically noted in specification below and accompanying drawing and be obtained.
accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of sealing flange in the present invention.
embodiment:
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Ductile iron pipe is through the fluid origin metal pipe of Centrifugal Casting Iron Pipe Machine high speed centrifugation, with bell socket, can be used for city water supply and sewage.A kind of ductile iron pipe push pipe of the present invention is the improvement on ductile iron pipe and concrete cement push pipe basis.
As shown in Figure 1, spheroidal graphite cast iron push pipe is made up of ductile iron pipe 1, concrete 2, steel wire 3, link 4, steel ring 5, push pipe mould 6 and sealing flange 7.When preparing spheroidal graphite cast iron push pipe, first water the ductile iron pipe 1 outpouring bellmouth band boss, ductile iron pipe 1 is loaded in push pipe mould 6, joint socket corresponding push pipe mould 6 bellmouth and the socket respectively of ductile iron pipe 1, then sealing flange 7 is loaded onto, push pipe mould 6 is erect, steel wire 3 is loaded onto in the middle of push pipe mould 6 with ductile iron pipe 1, to burn-on link 4 in ductile iron pipe 1 socket end distance socket hookup wire position, steel wire 3 is also welded with on link 4, pour into concrete 2 slurry prepared by a certain percentage, material filling limit, limit vibrates, sealing flange 7 is loaded onto after completing, then by push pipe mould 6 traverse, carry out steam curing, die sinking, socket steel ring 5 is loaded onto after outward appearance being polished smooth, after arranging spraying, two plastic glue strips are put at push pipe two ends, fluting in the middle of adhesive tape, stamp strap to fix.
When processing nodular graphite iron push pipe, the turning of ductile iron pipe 1 pipe die bellmouth need be gone out high 15 ~ 20mm, the groove of long 25 ~ 30mm, the ductile iron pipe 1 outpouring bellmouth band boss is watered by centrifugal pressure casting technique, after guarantee pours into concrete 2, minimum coagulate layer thickness is 5 ~ 15mm, thus ensure that intensity.
Push pipe mould 6 mainly plays fixing ductile iron pipe 1, concrete 2 is shaped and determines the effect of push pipe external dimension.Push pipe mould 6 length is 1970 ~ 5980mm, internal diameter size 403 ~ 1577mm; Mould axial direction adopts 2 ~ 3 joints, and be formed by connecting by sealing flange 7, sealing flange 7 thickness is 25mm, and silk hole is circumferentially 8 or 10 uniform, and aperture is φ 22mm standard silk.Radial direction is two semicircles, and centre connects with sealing flange 7, silk hole pitch 250mm.For ensureing stiffness, prevent die deformation, the steel plate thickness installing sealing flange 7 is designed to 25mm; Mould is that steel plate rolls, every 450mm welding one circle gusset along the circumferential direction, and the thick 10 ~ 15mm of gusset, high 50 ~ 80mm; Mold material is 45# steel or alloyed steel, and for convenience of the demoulding, mould internal diameter roughness requirements is not more than 6.3 μm.It is that 150mm is long that mould processes a length along cast tube sockets end, and the flanged (FLGD) pipe nipple in two ends, one end coupling mold, the other end installs sealing flange 7, and material is generally cast steel.Push pipe length variation does not allow to exceed+10mm, due to iron liquid composition and the isoparametric impact of heat treatment temperature, after the cast tube that the cast iron pipe die often propping up scale is poured into a mould out has moved back fire, length is incomplete same, certain in order to ensure socket hookup wire length, the special item length of tube that makes is needed to adjust sealing flange 7, the thickness of general sealing flange 7 is 5mm, 10mm, 15mm etc., the mounting interface form of sealing flange 7 is identical with die face, install to ring die tool 6 one end when needing, ensure that push pipe length is not overproof.
As shown in Figure 2, sealing flange 7 mainly plays sealing concrete, the effect of balance base.Sealing flange 7 external diameter and silk hole are designed to push pipe mould 6 supporting, internal diameter 326 ~ 1256mm, and material is 45
#steel, thickness is 25 ~ 50mm; During use, ductile iron pipe 1 is installed to after in push pipe mould 6, loads onto sealing flange 7, perpendicular mould, placement of concrete.For weight reduction, sealing flange 7 is fallen 25mm thickness away from one end turning of mould, sealing flange 7 is offered two sealed grooves, a seal groove internal diameter is respectively 340 ~ 1330mm, 490 ~ 1400mm, groove depth 4mm, groove width 9.5mm.Place seal ring in groove, prevent outside mould or the inner running pulp of cast iron tube.Sealing flange 7 mainly prevents the running pulp in steam curing process.Sealing flange 7 internal diameter is the large 0.5 ~ 1mm of cast iron pipe socket size comparatively, and with convenient assembling and disassembling, external diameter is identical with mould external diameter, and thickness is 50mm, material 45
#steel.
At the adjacent hookup wire position of push pipe socket, the steel ring 5 of thick 25mm is installed in pouring concrete layer one end, and effectively can bear jacking force suffered in pushing tow process, steel ring 5 internal diameter 0.5 ~ 1mm larger than ductile iron pipe 1 external diameter, external diameter is identical with push pipe external diameter.Because steel ring 5 will bear very large jacking force, for ensureing stress equalization, guarantee vertical with ductile iron pipe 1 when steel ring 5 is installed, steel ring material is 45
#steel.
Socket steel ring 5 is directly welded on the end face of link 4, thus ensure that the vertical of steel ring 5 and ductile iron pipe 1; Be welded on link 4 by the steel wire 3 after installing, during prevention cast concrete 2, steel wire 3 is out of shape or departs from origin-location, plays the effect of fixing steel wire 3.Link 4 and ductile iron pipe 1 surface of contact internal diameter 393 ~ 1377mm; with push pipe mould 1 surface of contact external diameter 403 ~ 1397mm; 6.3 μm are not more than with steel ring 5 surface of contact roughness; supporting rib thickness of slab 30mm on link; long 200mm, adopts FR Ni-1 pure nickel iron welding wire and automatic welding machine during welding, uses carbon dichloride gas shielded welding progress; the equal full weld of all face of weld is 15 ~ 25m with gas flow
3/ h.
The object adding steel wire 3 in push pipe is to reinforce outer concrete.Because jacking construction is generally below the road or building of underground 8 ~ 10m, do not excavate irrigation canals and ditches, pipeline is jacking section by section in underground.In jack-in process, overcome the effect of the power such as soil friction resistance, the gravity of cast tube own and anti-impenetrability resistance, outer concrete and socket circle will bear very large power, so consider when pouring concrete to add steel wire between mould and cast tube, material is the hand-drawn wire of diameter 6mm, length is about 60mm for removing cast iron tube joint socket rigidity part, and diameter is distance push pipe mould 6 inwall 25mm, and mesh diameter is 15 × 15mm.
Concrete outside ductile iron pipe 1 adopts common 425
#cement, the stone of 5mm grade, sand is that plain cast iron pipe liner washes sand with water, and proportioning is cement: coarse sand: stone: water: subtract gas agent=1:1.3 ~ 1.4:2.5 ~ 2.8:0.4 ~ 0.5: a small amount of, it is partially thicker good to expect, mixing time 10 minutes.Added equably by material in push pipe mould 6 chamber, little stream adds, and feeds in raw material while vibrate, and ensures material jolt ramming, cleans institute's clay slurry after filling it up with, install sealing flange 7, by mould traverse, cover sealing canvas, steam curing 8 ~ 12 hours.
The protection superscribing wide about 150mm in ductile iron pipe 1 socket installation position and push pipe concrete 2 two ends is respectively cotton, to reduce the collision in handling process, packs the thin steel band of cotton external application and tightens, the outermost surface plastic bag packaging of rainproof anti-gray.Damage the outer concrete layer of push pipe for colliding with each other between push pipe in prevention handling process; when packing, design is apart from each two plastic glue strips in joint socket each 500mm place; the wide 54mm of north material adhesive tape; high 40mm; length is the outer perimeter of different size push pipe; intermediate groove width just in time can put down bailing band, so both secures exterior package plastic tape, protects again the outer concrete of push pipe do not scratched and damage.
What finally illustrate is, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technological scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (8)
1. a ductile iron pipe push pipe, comprises ductile iron pipe, push pipe mould, sealing flange, concrete, steel mesh, link and socket steel ring; Described ductile iron pipe side is connected with push pipe mould, and push pipe mould side is provided with sealing flange, is provided with steel wire between described push pipe mould and ductile iron pipe, and link is arranged on the outside of ductile iron pipe and is connected with socket steel ring; The pipe die female end of described ductile iron pipe is provided with groove.
2. a kind of ductile iron pipe push pipe according to claim 1, is characterized in that: described groove groove depth 15 ~ 20mm, wide 20 ~ 30mm, one end of groove is provided with the tool withdrawal groove of 45 °.
3. a kind of spheroidal graphite cast iron push pipe according to claim 1, it is characterized in that: described push pipe mould is 1970 ~ 5980mm, mould internal diameter size is 403 ~ 1577mm, and thickness is 25 ~ 50mm.
4. a kind of ductile iron pipe push pipe according to claim 1, is characterized in that: described sealing flange is provided with two seal grooves, and seal groove internal diameter is respectively 340 ~ 1330mm and 490 ~ 1400mm, groove depth 4mm, groove width 9.5mm.
5. a kind of ductile iron pipe push pipe as described in claim 1, its preparation method is characterised in that to have following steps:
The first step: go out groove in the pipe die female end turning of ductile iron pipe;
Second step: water the ductile iron pipe outpouring female end band boss;
3rd step: cast iron push pipe is loaded in push pipe mould, sealing flange loaded onto by mould;
4th step: mould is established, loads onto steel wire, link of burn-oning, pours into the concrete prepared by a certain percentage;
5th step: steam curing 10 ~ 12 hours;
6th step: load onto socket steel ring after outward appearance polishes smooth, then puts two ripe adhesive tapes respectively at push pipe two ends, and in the middle of ripe adhesive tape, fluting, stamps strap and fix.
6. the described method preparing ductile iron pipe push pipe according to claim 5, it is characterized in that: described concrete proportioning is cement 1 part, coarse sand 1.3 ~ 1.4 parts, 2.5 ~ 2.8 parts, stone, 0.4 ~ 0.5 part, water and a small amount of air entraining agent, stir 10 minutes by raw material.
7. the described method preparing ductile iron pipe push pipe according to claim 5, is characterized in that: adopt FR Ni-1 pure nickel iron welding wire when welding, and adopt carbon dichloride as shielding gas.
8. the described method preparing ductile iron pipe push pipe according to claim 7, is characterized in that: the gas flow of described shielding gas is 15 ~ 25m
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813080.2A CN104565535A (en) | 2014-12-24 | 2014-12-24 | Nodular cast iron pipe jacking pipe and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813080.2A CN104565535A (en) | 2014-12-24 | 2014-12-24 | Nodular cast iron pipe jacking pipe and manufacturing method thereof |
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|---|---|
| CN104565535A true CN104565535A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410813080.2A Pending CN104565535A (en) | 2014-12-24 | 2014-12-24 | Nodular cast iron pipe jacking pipe and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715867A (en) * | 2016-04-26 | 2016-06-29 | 中国地质大学（武汉） | Dragging and jacking combined laying method for nodular cast iron pipes |
| CN109667934A (en) * | 2018-12-26 | 2019-04-23 | 新兴铸管股份有限公司 | A kind of pipe joint sealing device and preparation method |
| CN114058760A (en) * | 2021-11-15 | 2022-02-18 | 攀钢集团工程技术有限公司 | Method for quickly replacing local hot air pipeline on hot air pipe of blast furnace |
| CN114833933A (en) * | 2022-03-29 | 2022-08-02 | 圣戈班管道系统有限公司 | Maintenance process for cement mortar lining of nodular cast iron pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777706A (en) * | 2012-08-10 | 2012-11-14 | 新兴铸管股份有限公司 | Encased concrete nodular cast iron pipe |
| CN103486349A (en) * | 2013-09-23 | 2014-01-01 | 河北新兴铸管有限公司 | Nodular cast iron jacking pipe and producing method thereof |
| CN104197118A (en) * | 2014-08-21 | 2014-12-10 | 山东球墨铸铁管有限公司 | Nodular cast iron top tube |
-
2014
- 2014-12-24 CN CN201410813080.2A patent/CN104565535A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777706A (en) * | 2012-08-10 | 2012-11-14 | 新兴铸管股份有限公司 | Encased concrete nodular cast iron pipe |
| CN103486349A (en) * | 2013-09-23 | 2014-01-01 | 河北新兴铸管有限公司 | Nodular cast iron jacking pipe and producing method thereof |
| CN104197118A (en) * | 2014-08-21 | 2014-12-10 | 山东球墨铸铁管有限公司 | Nodular cast iron top tube |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715867A (en) * | 2016-04-26 | 2016-06-29 | 中国地质大学（武汉） | Dragging and jacking combined laying method for nodular cast iron pipes |
| CN109667934A (en) * | 2018-12-26 | 2019-04-23 | 新兴铸管股份有限公司 | A kind of pipe joint sealing device and preparation method |
| CN109667934B (en) * | 2018-12-26 | 2021-02-09 | 新兴铸管股份有限公司 | Pipeline interface sealing device and preparation method |
| CN114058760A (en) * | 2021-11-15 | 2022-02-18 | 攀钢集团工程技术有限公司 | Method for quickly replacing local hot air pipeline on hot air pipe of blast furnace |
| CN114833933A (en) * | 2022-03-29 | 2022-08-02 | 圣戈班管道系统有限公司 | Maintenance process for cement mortar lining of nodular cast iron pipe |
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Application publication date: 20150429 |